Bag filling machine



1932- F. J. STEPHENS BAG FILLING MACHINE Filed Jan. 21, 193].

INVENTOR FREE 0 J. 5TEPHEN5- M/Z Al ATTORNE Patented Aug. 16, 1932 FREDJ. STEPHENS, 0F CAMBRIDGE, MASSACHUSETTS, ASSIGNOR TO UNITED STATESGYPSUM COMPANY, OF CHICAGO, ILLINOIS, CORPORATION OF ILLINOIS I UNETEDSTATES PATENT BAG FILLING MACHINE Application filed January 21, 1931.-SerialNo. 510,166.

This invention relates to bag filling machines, and has reference moreparticularly to bag filling machines in which accurate weight ofpowdered material such as lime, calcined gypsum, Portland cement, etc.,are run into paper bags preparatory to shipment.

In the filling of paper bags, it is customary to slip a paper bag havinga valve opening over a filling nozzle with the bottom of the bag restingupon a support, which in turn is carried on the end of a scale beam.Suitable weights are adjustably supported on the op posite end of thescale beam for counterbalancing the weight of the filling bag 011 thebag support and when the weight of the powdered material in the bagoverbalances the weight on the scale beam, the flow of the powderedmaterial into the bag is automatically stopped. It has been found that,owing to the fact that the weights on the scale beam are notconveniently located for easy adjustment, the workmen are negligent inso adjusting the weights with the result that an incorrect weight ofpowdered material is run into the bag.

An object of this invention, therefore, is to provide a bag fillingmachine in which weights of low denomination are placed on the bagsupport at the front of the machine in convenient reach of operator, formaking a fine adjustmentof the quantity of material put into the bag;also to improve bag filling machines in other respects hereinafterspecified and claimed.

Reference is to be had to the accompanying drawing forming a part ofthis specification, in which 1 Fig. 1 is a side elevation of machine,

Fig. 2 is a front elevation of machine,

a bag filling a bag filling Fig. 3 is a sectional elevation showing a'hanger for supporting weights of low denomination, and

Fig. 4 is a sectional elevation through the weight hanger taken on line44: of Fig. 3.

A standard type of bag filling machine is illustrated, which is wellknown in the art, and comprises vertical standards 10 which otallysupported a scale carry a scale fulcrum 11, upon which is pivbeam 12; Abag frame 13 is provided with a pair of pivot blocks 14 which arepivotally supported upon a knife edge 15 which is mounted on the forwardend of the scale beam 12. A bag-support 16 is secured to the frame 13and carries an adjustable platform 17 for supportingthe bottom of thebag to be filled. A filling spout or nozzle 18 is also carried by theframe 1.3, and the valved end of the paper bag is slipped over saidspout 18,.the bottom of the bag'resting upon the platform 17. The upperend of the bag frame 13 is connected by a pivoted link 19 to the mainframework of the filling machine. Suitable ejecting mechanism isprovided inside of the bag filling machine to eject the powderedmaterial out of the spout 18 and into the bags to be filled. It iscustomaryto provide suitable limit stops 20 on the rear end of the scalebeam 12 so as to limit the tilting movement of said scale beam. Aplurality of heavy weights 21 are also suspended from the rear end ofthe scale beam 12 by means of any suitable brackets 22, said bracketsbeing adjustable along the scale beam 12 and being secured in positionby an adjusting screw 23. Owing to the inconvenience of changing theposition of the weight brackets 22, or changing the weights 21 to obtainthe proper weight of powdered material in the paper bag, the workmenfrequently neglect to secure the desired weight in the bag with theresult that the bags are shipped out without containing the properweight of the material.

The salient feature of this invention, therefore, consists in providingan L shaped bracket 24, or other suitable supporting means, on theportion of the bag filling machine supporting the bag, as the bag frame13. This bracket 24 is preferably square in cross section and has anupwardly extending arm 25 for retaining in place a plurality of weights26 of low denomination. weights may be equivalent to a weight of orpound of powdered material in the bag. The weights 26 are preferablyprovided with an inwardly extending slot 27 for receiving the supportingbracket 24. The in- These ward end of the bracket 24 is preferablyprovided with a threaded section 28 which is screwed into a tapped holeformed in the frame 13. It will thus be seen that since the bracket 24is mounted at the front of the machine on the bag frame 13 in convenientreach of the workmen, the workmen will diligently see that the properweights are hung on the bracket 24 to obtain exactly the weight desiredin the bag. a

I would state in conclusion that while the illustrated exampleconstitutes a practical embodiment of my invention, I do not wish tolimit myself precisely to these details, since 15 manifestly the samemay be considerably varied without departing from the spirit of theinvention as defined in the appended claims.

Having thus described my invention, I claim as new and desire to secureby Letters Patent I A 1. In a bag filling machine, a pivotally mountedscale beam, a bag supporting frame mounted upon one end of said scalebeam, means associated with said frame for injecting powdered materialsinto said bag, weights adjustably mounted upon the opposite end of saidscale beam, and weights of low denomination carried upon said bagsupporting frame;

2. In a device of the class described, the combination with a scale beamand a bag supporting frame mounted on one end of said scale beam, ofweights of low denomination detachably mounted upon said bag frame,

FRED J. STEPHENS.

